what E versions of Bf109 will be flyable?

[Blackdog_kt]

Originally Posted by zakkandrachoff

I never read that Emil have 3 cannons.

Well, it's in your first post

Originally Posted by zakkandrachoff

Bf 109E-3:

The E-3 was the second main variant of the 109E. It appeared towards the end of 1939. It had an MG FF/M cannon firing through the airscrew hub, and mounted inside the engine. The engine was also changed to the DB 601Aa, providing another 76 hp of power. The extra cannon was not popular with the pilots, and was often removed once the aircraft reached front line units. Its position inside the engine had produced massive vibration, which caused the gun to be inaccurate and jam. Most E-3 models had the machine guns in the wing replaced by 20-mm MG FF cannons, giving this model much greater firepower than the E-1, even without the engine mounted gun.

The way i read this, it means that most E3s had MGFF cannons in the wings to replace the machine guns, while some E3s had a cannon in the nose too but most of them were removed in the field (even if they were factory fitted to start with). At least that's what i understand from your initial post.

So, the amount of possible variations would be:
2xMG17 (cowling) 2xMGFF (wings)
2xMG17 (cowling) 2xMG17 (wings)
2xMG17 (cowling) 2xMG17 (wings) 1xMGFF (nose)
2xMG17 (cowling) 2xMGFF (wings) 1xMGFF (nose)---> 3 cannons